Source: Jason La Canfora, CBS Sports 
Smith, who was an impact player in certain situations for the Jets, became a free-agent a few days ago following a short stint with the Bills. Buffalo signed him as a free agent under a former coaching regime, and injuries derailed him this season.
Smith, however, got healthy enough to pass a physical last week and was released from IR by Buffalo. The Eagles, who run a lot of spread formation stuff under Chip Kelly, have suffered through several injuries to receivers and Smith’s Wildcat skill set fits their offense well.